Let's expand the idea further - now that the anti-semitism and Nazis have all been but wiped out and is illegal in many parts of the world, and the western Christian nations are not just ashamed but also feel genuine guilt for their silent role in allowing the Holocaust to happen, why don't the Jews who migrated from around the world to the middle-east just go back to the country they originated from?
After all, the root of this problem is that the west forced the idea of a state on the Jewish nation.
They could have carved out a state in Europe for them (they wouldn't have needed to even part with their own lands - after all, they had won WW2 and the land of the defeated Nazis was aplenty). Instead they encouraged the Jews to "share" land with the original inhabitants (the Arab Jews, Muslims and Christians), in a country the west had no right to in the first place as colonisers. And all the conflict was born from this "stupid" political idea of forcing "outsiders" to settle on land that the west had no right to in the first place.
So why not just forgo this whole idea itself of a "Jewish state"? Why does the Jewish nation need a state in this modern era, when it has existed for centuries before without one?
You see the political ingenuity behind this idea, right? Even if all the Palestinians are absorbed by their neighbouring Arab states, there is no guarantee that the conflict will end as many will continue fighting the Israelis. But if the west takes back the Jews they chased away, and the "foreign" Jews in the middle-east go back voluntarily, the conflict resolves itself permanently!
Right?
(Yes, I am being somewhat sarcastic with the above. But I am sure you understand the point I am trying to make - put yourself in the other shoe, and genuinely empathise, and you can see how such ideas are not only callous but also not realistic).
To be more clear, let's seriously compare the pros and cons of both ideas. There are 3 political elements common to them:
- Those who migrate from the region, have to forgo the idea of statehood.
Both the Israelis and the Palestinians who migrate away from the region can be assured of a more secure and peaceful life than the violence-ridden society they currently live in. The only thing they have to sacrifice is "statehood" for their people.
However, both sides are also convinced that without statehood, their own existence is in danger.
This is one of the major cons of both proposal - neither the Israelis nor the Palestinians want to give up the idea of statehood. Their history attests to this.
- Foreign countries have to offer refuge and accept the migrants / refugees.
For both ideas to work, other countries have to be willing to accept these people.
For Israeli Jewish migrants this is more doable - Israel is a western ally, it has integrated western values in its culture, Israelis have proven to be skilled workers and entrepreneurs (which the west needs), they are mostly economically well-off and will be less of burden on the state, they have a historical association with the west as they migrated from there and, over all, Israeli Jewish migrants, especially if they are Caucasians, would be more preferred in Europe and US than Muslim or Asian migrants.
Palestinian migrants, on the other hand, will have a tough time finding acceptance in other countries. Nearly half a million+ of them are already refugees in their neighbouring states, who are developing countries, that cannot absorb more without facing economic hardship. Most Palestinians are unskilled and impoverished. Many have faced problems in integrating well with their host society due to economic hardship and unwillingness to stop fighting for their statehood, thus threatening the internal security of their host state - another answer has pointed the example of Jordan that faced a Palestinian rebellion. Egypt is one of the few Arab state that has a peaceful and normal diplomatic relationship with Israel. It fears that this could get damaged if the Palestinian refugees use its land and resources to launch attacks on Israel (which has happened in the past). Neither the US nor Europe are welcoming to Arab Muslims. Africa is impoverished and cannot accept foreign refugees. Asia is already overpopulated by the Chinese and Indians who are already struggling to lift 100's of millions out of poverty. The sad reality is that Palestinians really don't have anywhere to go.
- The migrants / refugees have to be willing to settle in another country.
Forced displacement of people from their native place is a genocidal act. Both ideas only work if the majority of the population can be convinced to leave, with the guarantee that they will not change their mind and come back again when the region becomes peaceful again. And remember that we are talking about displacing and moving lakhs of people.
The right of return has been a central tenet of the Palestinian nationalist movement since 1948 when many Palestinian refugees left their homes believing that they would return shortly, as a result often taking only a few belongings with them. While events on the ground put paid to these immediate plans, they did not destroy the hope of eventual return in the future. On the contrary, the collective Palestinian desire for repatriation remained strong, buoyed by the United Nations’ (UN’s) formal endorsement of the right of return in Resolution 194. Calls for the realisation of this right became central to Palestinian political discourse, and Resolution 194 remains a popular and effective rallying cry today.
... The suspicion felt by many Palestinian refugees towards resettlement was also due to the perceived implications of the solution’s permanence. This is certainly not exceptional, in view of many refugee groups’ continuing preference for repatriation over other solutions. If people wish ultimately to return home, they are less likely to embrace measures that they fear will undermine their ability to do so.
While Jews in the past have been more than willing to leave Israel, now that Israeli nationalism and statehood has become stronger, it is very doubtful if the majority of current Israeli citizens could be persuaded to migrate. Likewise, with the Palestinians, whose earlier experience with forced displacement has just made their desire for their own homeland stronger over the decades. This again is a major con for both proposals.
As we can see, the cons (point 1 and 3) outweighs the pros (point 2 for Israeli migrants) making both plans realistically very unviable.
Reference:
Why Egypt and other Arab countries are unwilling to take in Palestinian refugees from Gaza
Rejecting resettlement: the case of the Palestinians
Who are the Palestinians?
History of Israel
State, Nation and Nation-State: Clarifying Misused Terminology